Boiler.



UNITED STATES ,PATENT OFFICE.

WALTER AUTHER BERRY, OF OHATTANOOGA, TENNESSEE, ASSIGNOR OF ONE-HALF TO.y

BOILER.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed May 11, 1908; Serial No. 432,192.

To all 'whom 'it may comem:

Be it known that I, WALTER A. BERRY, a citizen of the United States, residing at Chattanooga, in the county of Hamilton and State of Tennessee, have invented new and useful Improvements in Boilers, of Which the following is a specification.

This invention relates to boilers of the Water tube type, and has specially in view certain improvements therein which will cause the heat and other products of combustion to pass over and about all the water tubes so as to assure of the same being kept in a highly heated condition.

With the above and other objects in view, the invention contemplates the production of a boiler of the horizontal type comprisingan Outer shell and an inner shell, the inner shell being held in spaced relation to the Outer shell so as to provide water spaces Which practically surround the same, and in further equipping the inner shell with a plurality of crossing water tubes .arranged in checkered relation, which, in conjunction with a novel form of bridge Wall and depending water pocket, cause the heat from the fire Chamber to be deflected over and about all the said water tubes.

In the practical application of the invention manypchanges in detail and structural arrangements may be resorted to, a practical and preferred embodiment of which isy shown in the accompanying drawings, in Which- Figure 1 is a front view of the boiler, showing the arrangement of the clean-out openings in the outer shell. Fig. 2 is a longitudinal vertical sectional view of the same. Fig. 3 is a cross Sectional view, taken on the. line 3-3, Fig. 2. Fig. 4 is a similar view taken on the line 4-4, Fig. 2.

Like charactersof lreference designate corres .onding parts.

t is preferred to associate the present invention with the type of boiler known as the horizontaL and the same comprises an outer shell or casing, the front sheet 1 of Whichhas the usual lower draft door 2, and fuel door 3, and above the same said front` sheet 1 has formed through it a plurality of horizontally 'arranged clean-out openings 4, Which are kept. tightly sealed through the medium of arched caps 5 and co erating locking bolts 6 carrying spiders 7 w ich engage the inner surface. ofV the said frontsheet. The rear. sheet 8 of the outer shell is. simi- The vertical side sheets.17-18- and the arched top sheet 19 are preferably integral-,

and to facilitate connection therebetween and the front and rear sheets, the latter are rovided with uplper and lower inturnedV anges 20-21, w ich are bolted, or otherwise secured to the edges of said top and side sheets,. as indicated at. 22-23. The side sheets 17-18 have formed through them a plurality of longitudinally arranged rows of cleanout openings 23-24, sealing capsV 25-26, and locking bolts 27-28 and spiders 29-30, which are of the same type as those described in connection withv the front and rear sheets, but for the purpose which will' presently appear, the clean-out openings inthe side sheets are arranged in difierent planes from those in the front' and rear sheets, so that each row therein will alternate with the rows in said front and rearv sheet, as is. more clearly shown in Fig. 1 of the accompanyingdrawingls.

ReferringV more particularly to Fig. 2 of the accompanying drawings, it will be observed that the front ortion of the arched top of the outer shell has formed through it an opening 31 around which isr seated a threaded nipple 32 adapted for the attachment of the usual steam conveying pipe not shown, and adj acent to said steam exit opening a manholeV 33 is formed through the said arched top, the inner edge of' which hasa depending flange 33*EL which, engages the spider 34 of a lockingJ bolt 35 carried by anarched sealing cap 36 Which enga'ges the outer surface of' the said archedtop sheet, when the locking bolt is manipulated to cause its. spider to engage with theinner depending fiange 33. The said arched top. is also provided with an opening 37 over which is fitted a flanged and threaded nipple 38 to which isfitted the usualsafety Valve, not shown. The rear portion of the arched top has. formed through it an enl'argedl and preferably circular opening 39A the edge of' which carries an annular angular reinforcing strip and holding strip 40 which serves to hold therein a smoke pipe 41.

The bottom sheet 42 -of the boiler at approximately its midlength, is provided with a manhole 45 which has formed around its interior edge an annular angular flange 46 which a looking spider 47 carried by a locking bolt 48 engages to retain an arched cap 49 over the outer side of said manhole.

The inner side of the arched to i sheet of the boiler is provided with a pfhrality of channeled irons 50 which carry depending stay bolts 51 the lower ends of which are rigidly connected with angle irons 52 carried by the crown sheet 53 of an inner tube shell 54. Said inner shell 54 is provided with front and rear sheets 55-56 which have a plurality of rows of horizontally arranged openings 57 -57 which are in alinement with the clean-out openings formed in the front and rear sheets. The crown sheet 53 adjacent to its rear end is provided with an opening 58 to the edge of which is bolted the flanged open top 59 of a depending water pocket 60, the side walls of which have formed through them a plurality of horizontally arranged openings 60-61 which are in alinement with the rows of openings formed in the front and rear sheets of the inner shell and are adapted to receive the ends of longitudinal water tubes 62-63 the other ends of which are supported within the openings in the front and rear sheets. Immediately in the rear of the pocket opening in the crown sheet, another opening 64 is formed which communicates with the lower end of the smoke pipe and around the same an annular flanged connecting and reinforcing iron 65 is seated which has a bolted connection with said crown sheet and said smoke pipe. The side sheets 66-67 of the inner shell are provided with a plurality of rows of longitudinally arranged openings 68-69 which are in alinement with the clean-out openings formed in the side sheets of the outer shell and have the ends of the crossing water tubes 70 seated therein. The bottom sheet 71 of the inner shell has its ends securely fastened to inturned flanges carried by the end sheets of the inner shell, and at approximately its midlength it has formed therein an opening 72 around which is mounted the'flanged entrance 73 to a hollow bridge wall 74 the rear wall of which has openings 75 formed therein which aline with the openings formed in the lower portion of the rear sheet ofthe inner casing and which receive the ends of short-length water tubes 76.

Immediately in front of the hollow bridge wall a space is left in the inner casing for a fire chamber 78 provided with the usual rate 79 and lower opening 80 communicatmgwith the draft door and upper opening 81 communicating'with the fuel door. The top and bottom of the fuel opening is sealed by means of the inserted flanged plugs 82-83 and the draft opening is also similarly sealed at its top and bottom by plugs 84.

In order to assist in retaining the inner shell in a regularly spaced apart relation to the outer shell end stay bolts 86 and side stay bolts 87 are employed, as is usual in boiler construction.

From the foregoing description it Will be seen that the space between the' two shells is utilized for holding water and through the medium of the crossing pipes there is at all times a communication wlth said water spaces. And it will be further seen that When t e products of combustion leave the fire chamber they will be deflected upward by the hollow bridge wall and caused to pass over and about the crossing pipes through the checkered openings therebetween, until they reach the water pocket by which they will be deflected downward and over and about the lower short length tubes and thence upward through the upper tubes and out through the smoke pipe. This arrangement of deflectors in the path of movement of the roducts of combustion assures of all tubes being acted on by the heating agents, and as said deflectors are all hollow and contain water, such water therein is also kept in a highly heated condition.

VVhat I claim is.

1. A boiler comprising an outer shell, an inner shell held in spaced relation to said outer shell and being provided with a lurality of rows of crossing water tubes, a ollow bridge Wall carried by the lower portion of said inner shell, and a depending water pocket carried by the upper portion, said bridge wall and said water pocket being so arranged relatively that the heating agents will be deflected thereby on its passage through said inner shell.

2. A boiler comprising an outer shell, an inner shell held in rigid relative spaced relation to said outer shell, and being rovided with a plurality of rows of longitudinal and lateral crossing water tubes, an upstandin hollow bridge Wall carried by said inner shefl and a depending water pocket also carried by the inner shell, said water pocket and said bridge wall being arranged in the path of movement of the heating agent and adapted to defiect the same through various parts of the inner shell.

3. A boiler comprising an outer shell the walls of which are rovlded with clean-out openings, an inner s ell held in spaced relation to the outer shell and being rovided with a plurality of tiers of longitu inal and lateral water tubes, thefendskof which aline with the openings formed in the said outer shell, and up er and lower hollow deflectors arranged Wit in the inner shell and adapted to deflect the products of combustion to Various arts of the same.

4. A oiler comprising an outer shell and an inner shell held in relative spaced relation 5 to provide Water spaces therebetween, crossing Water tubes carried by the inner shell the ends of Which communicate With said Water spaces, a holloW Water pocket in communication With said Water spaces and also With one 10 end of a portion of the Water tube, and a holloW bridge Wall also in communication with the Water spaces and some of the Water tubes, said Water pocket and bridge Wall being 1ocated in the path of movement of the heating agent and adapted to deflect the same to Various parts of the inner shell.

In testiniony Whereof, I afiiX my signature in presence of two Witnesses.

WALTER AUTHER BERRY. Witnesses:

B. M. LEWIS, J. N. MOLEAN. 

